Being nice is a competency issue

Often people can be very broadly categorised into two types Simple/nice/naive people who harbour no Ill intentions towards others , aren't toxic and don't play mind games or try to harm others in any sense Cunning/Manipulative people who are extremely street smart can play people according to their whims and wishes. Would trick others into believing/doing things how they want. Not so nice people I know this is way too broad of a generalisation but you might get the gist. I think I belong to first type , so lately I have been having the thought that the reason first category of people suffer emotionally and through other ways in life is because it's easy to be simple and naive and it takes effort to be cunning and Manipulative. Like you can be dumb and oblivious of others thinking or intentions towards you. You can be simply enjoying life etc without constantly thinking how you might be wronged etc. But to be second type you constantly need to observe people , think hard of ways you can beat around them etc. You need to constantly manipulate someone even your loved one for them to act accordingly to your whims. Again this is a broad generalisation but acc to this it makes sense that naive/nice people suffer and cunning people thrive and the main question is do you think it's justified?